Satcom 1 [RCA]
Satcom 1, 2, 3, 3R and 4 were the first generation of geostationary comsats built for RCA Americom.
These satellites were built by RCA Astro using their three-axis stabilized AS-3000 bus, which became the base for several other comsats too. They featured a 24 C-band transponder communications payload. The antenna featured four gridded overlapping reflectors.
The satellites required the development of a more powereful version of the Delta launch vehicle, the Delta-3914, which was partially financed by RCA.
Satcom 1 was launched on launched 13 December 1975. It was replaced in summer 1983 by Satcom 1R and was finally put in a graveyard orbit in June 1984 and turned off.
Satcom 2 followed on 26 March 1976. It was replaced in fall of 1983 by Satcom 2R and then was turned off and moved above synchronous orbit.
Satcom 3 was successfully launched on 7 December 1979, but the satelite was lost, when the apogee engine was fired.
Satcom 3R was orbited on 19 November 1981 as a replacement for Satcom 3. It operated a 131° West.
Satcom 4 was launched on 15 January 1982 and placed on the 82° West position.
This series was succeeded by the advanced Satcom series.
|Type / Application:||Communication|
|Equipment:||24 C-band transponders|
|Propulsion:||SVM-7 (#1, 2, 3); Star-30B (3R, 4)|
|Power:||2 deployable solar arrays, batteries|
|Lifetime:||7 years (#1, 2); 8 years (#3, 3R, 4)|
|Mass:||868 kg, 465 kg (BOL) (#1, 2)|
|Satcom 1||1975-117A||13.12.1975||CC LC-17A||Delta-3914|
|Satcom 2||1976-029A||26.03.1976||CC LC-17A||Delta-3914|
|Satcom 3||1979-101A||07.12.1979||CC LC-17A||Delta-3914|
|Satcom 3R||1981-114A||20.11.1981||CC LC-17A||Delta-3910 PAM-D|
|Satcom 4||1982-004A||16.01.1982||CC LC-17A||Delta-3910 PAM-D|